Why glass analysis is important in forensic science?
Advances in technology provide forensic scientists with better tools to detect, to identify, and to individualize small amounts of trace evidence that have been left at a crime scene. The analysis of glass fragments can be useful in solving cases such as hit and run, burglaries, kidnappings, and bombings.
How can glass analysis help solve a crime?
Comparing the color of a suspect piece of glass with the color of a reference sample can distinguish whether the two samples share a common source. As a consequence, significant color differences between glass fragments can be used as the basis for exclusion of a suspect.
What are the most important properties of glass used by forensic scientist?
To compare glass fragments, a forensic scientist evaluates two important physical properties: density and refractive index. Is a precise and rapid method for comparing glass densities. A glass particle is immersed in a liquid. The other pieces of glass will remain sink, or float.
What is the value of glass as evidence?
Purpose The value of glass fragments as evidence is not always fully recognized. Windows, automobile glass, broken bottles, and other glass objects may be crucial evidence in burglary, murder, hit-and-run and many other types of crime.
How is glass analysis used in forensic chemistry?
A forensic glass analysis is typically a comparison of two or more glass fragments in an attempt to determine if they originated from different sources. Less frequently, it is a question of determination of end use, or glass provenance. … The aim of a comparative glass analysis is to exclude possible sources.
Why is it important to analyze glass?
Glass analysis can be helpful in various ways. Glass fragments at a crime scene should always be collected and analyzed because several clues can be gathered about the events that occurred during the crime. Fragments of glass from headlights at a hit-and-run scene can leave clues about the unknown vehicle.
What is the role of forensic science in criminal investigation?
The types of evidence and where it is found can assist investigators to develop a sense of how the crime was committed. … In addition, the application of forensic examination and analysis could turn any of these exhibits into a potential means of solving the crime.
What techniques are used in forensic science?
Traditional forensic analysis methods include the following:
- Chromatography, spectroscopy, hair and fiber analysis, and serology (such as DNA examination)
- Pathology, anthropology, odontology, toxicology, structural engineering, and examination of questionable documents.
How has forensic science helped solve crimes?
Forensic science is a critical element of the criminal justice system. Forensic scientists examine and analyze evidence from crime scenes and elsewhere to develop objective findings that can assist in the investigation and prosecution of perpetrators of crime or absolve an innocent person from suspicion.
What are the four main properties of glass that are used to analyze glass?
The main characteristics of glass are transparency, heat resistance, pressure and breakage resistance and chemical resistance. Thermal conductivity determines the amount of heat required to flow through the cross sectional area of the float glass sample in unit time at a temperature gradient.
What is the first step Forensic scientists must do to analyze evidence?
What is the first step forensic scientists must do to analyze evidence? Take measurements to identify the characteristics of the evidence.
How can the glass evidence help the investigator locate the vehicle that fled the scene?
How can the glass evidence help the investigator locate the vehicle that fled the scene? The right side of the figure below depicts stress marks on the edge of a glass fracture caused by the application of force. … If this is a radical fracture the force came from the right. if it is concentric it came from the left.